The progenitor of all Threepersons-style holsters: Tom Threepersons' personal, well, Threepersons holster. It's believed to have been made for his shift from Army to blacksmith to El Paso P.D. during 1919; the year that its maker, saddler A.B. Egland, opened up in Douglas AZ. Douglas is the city in which Tom enlisted in the Army in 1916. His style was so-named by Sam Myres in his 1931 'Officers Equipment' catalog that marked Sam's entry into the holster business to save his company from the ravages of the Model T introduced 1908. According to his biographer Sandra Myres, it worked. Tom made at least part of his living selling his story through writers Cunningham and Arnold, and from royalties from Myres, and from promoting Booger Reds rodeo clothing when Booger himself died in 1924 (Booger was a rodeo exhibition rider who was so-named after he blew up a tree stump, and his face, with black powder). Tom was able to retired on a largish sum paid to him for the 1964 appearance of a TV movie named for him. A 1982 newspaper article quoted a friend of Tom's as saying "I've never known him to work".

His holster, shamelessly illustrated with a capgun in it (not least because it's a Nichols capgun)(also coincidentally, Tom's second wife Lorene was a Nichols by her first marriage).

Tom appearing for Booger Reds rodeo clothing, holding his 1909 Colt 45LC and with his Winchester of 1914

The Colt; he also had a 1905 Colt in 44 WCF that looks quite like the 1909. This one has had its frontstrap filed into a coarse checkering that runs onto the grips, leaving behind what looks like 'notches' on the edges of the ivory grip (the other side is pearl) and thereby leading to the myth that Tom had notched his pistol for 20 kills.

His Winchester made 1914 and delivered to El Paso in 1915, along with his S&W (finally got there) Triple Lock also of 1915.
I found his holster hiding in plain sight here on the Forum since 2008, when tiny images of it were posted at the death of its owner with it to be returned to its original (well, after Tom) owner's widow; which it was. I bought it from her when she wouldn't let me photograph it even by turnerriver in FL unless I bought it. That set in motion many things including turnerriver's and my book Holstory that includes a full chapter about Tom. It was when I bought it that it became worthwhile to ensure that it was 'our' Tom's holster of Texas; not the original Indian (and British citizen) rodeo winner of 1912 from whom our Tom took his name, who lived and died in Alberta Canada.